Can cold therapy speed up muscle recovery?

Cold can temporarily reduce muscle soreness after exercise, but that does not mean that muscles recover any faster. The evidence varies depending on the application. Cold therapy is not a necessary step after every training session. Read more about the research into cold immersion at Cochrane.

Can wearing a back brace help with back pain?

A back brace is not usually necessary for ordinary back pain. In certain medical situations, a doctor may recommend a brace for a short period. Discuss the purpose and duration of use, and keep moving within your capabilities and in accordance with any medical instructions. Do not automatically buy a brace just because you have back pain.